Mark Johnson suggested the following change
><Before>
>GOOD.ANS=FALSE
>LOOP UNTIL GOOD.ANS DO
> PRINT "ENTER 'Y' OR 'N' ":;INPUT ANS
> IF ANS="Y" OR ANS="N" THEN GOOD.ANS=TRUE REPEAT
>
><after>
>LOOP WHILE TRUE DO
> PRINT "ENTER 'Y' OR 'N' ":;INPUT ANS
> IF ANS="Y" OR ANS="N" THEN EXIT
>REPEAT
These forms all work (Universe 10.2.0) and are progressively shorter
than the above
LOOP
PRINT "ENTER 'Y' OR 'N' ":;INPUT ANS
IF ANS="Y" OR ANS="N" THEN EXIT
REPEAT
LOOP
PRINT "ENTER 'Y' OR 'N' ":;INPUT ANS
UNTIL ANS="Y" OR ANS="N" DO
REPEAT
LOOP
PRINT "ENTER 'Y' OR 'N' ":;INPUT ANS
UNTIL ANS="Y" OR ANS="N" REPEAT
LOOP PRINT "ENTER 'Y' OR 'N' ":;INPUT ANS
UNTIL ANS="Y" OR ANS="N" REPEAT
Ray Wurlod was a great proponent of the LOOP WHILE READNEXT ID format.
I believe it may not compile on some MV systems.
Regards, Keith
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